Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 20 · 40 questions

Remember (Find the topic, use the idea): Find the topic: energy, safety, conductor, closed loop, switches, cells, symbols, series or parallel. Use that lesson’s idea — complete loop, all ON for series, cells add up, one path or many. For sums, write the working and check it again.

1. 1.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a small battery pack (c) a wall socket (d) a mains extension board
2. 2.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) both lines (d) the longer line
3. 3.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the base (c) the filament (d) the glass
4. 4.Which of these mainly gives out heat? (a) an electric drill (b) a school bell (c) a buzzer (d) an electric iron
5. 5.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
6. 6.Which of these is safe? (a) poke things in a socket (b) throw cells in a fire (c) stay away from pylons (d) use a cable with cuts
7. 7.🔍 Which is the odd one out? (a) poke things in a socket (b) touch a fallen wire (c) climb an electric pole (d) build with an adult near
8. 8.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is ON, C is ON and D is OFF. Does the bulb glow? (a) No (b) Yes
9. 9.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) cell (b) capacitor (c) bulb (d) switch
10. 10.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) each gets full voltage (d) to make bulbs dim
11. 11.⚡ What does a table fan mainly change electricity into? (a) sound (b) heat (c) light (d) movement
12. 12.Which of these uses electricity? (a) a solar panel (b) a battery (c) a wind turbine (d) a computer
13. 13.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) Yes (b) No
14. 14.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
15. 15.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) sound energy (c) chemical energy (d) light energy
16. 16.Which of these means the circuit is closed? (a) the loop is complete (b) a wire is cut (c) the bulb is unscrewed (d) the switch is OFF
17. 17.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) to make it colourful (c) symbols are heavier (d) quick and clear for all
18. 18.Which of these is an insulator? (a) an iron nail (b) a copper wire (c) a plastic straw (d) a metal paper clip
19. 19.True or false: to dry your hands first is safe. (a) True (b) False
20. 20.🔘 Which kind of switch flips up or down? (a) a reed switch (b) a toggle switch (c) a tilt switch (d) a push button
21. 21.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is ON. Does the bulb glow? (a) No (b) Yes
22. 22.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 5 of the switches are OFF and the rest are ON. How many bulbs glow?
23. 23.True or false: one tall, one short bar is the symbol for a cell. (a) False (b) True
24. 24.🔘 Which kind of switch stays where you flip it? (a) a push button (b) a tilt switch (c) a reed switch (d) a toggle switch
25. 25.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) motor (b) cell (c) ammeter (d) resistor
26. 26.🔍 Which is the odd one out? (a) use small battery cells (b) fly a kite near wires (c) keep drinks far away (d) dry your hands first
27. 27.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) battery (b) capacitor (c) LED (d) voltmeter
28. 28.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 1 glow? (a) Yes (b) No
29. 29.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) the bulb is unscrewed (d) all wires are joined
30. 30.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
31. 31.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is ON, C is OFF and D is ON. Does the bulb glow? (a) No (b) Yes
32. 32.True or false: a torch mainly gives out light. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) a steel coin (b) a ceramic cup (c) aluminium foil (d) a steel spoon
34. 34.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a bulb (c) a plug top (d) a long wire
35. 35.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
36. 36.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
37. 37.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
38. 38.🔋 4 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
39. 39.What does a toggle switch do? (a) closes near a magnet (b) closes when tipped over (c) springs back when let go (d) stays where you flip it
40. 40.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) a closed circuit (c) a series circuit (d) an open circuit

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